A student prepares a solution of a weak monoprotic acid by dissolving 0.080 moles of the acid in enough water to make
1.0 L of solution. The pH of the resulting solution is 4.51. What
is the Ka for this acid?
a- 9.5 X 10-10
b- 1.8 x 10-5
C- 3.9 X 10-4
d- 6.1 x 101
e- 1.2 x 10-8

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?  

Your answer is a just took the test

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.